Dec. 14: 'Tragedy at Sandy Hook Elementary' (LIVE report)

Lester Holt and Brian Williams will anchor a special hour of Dateline devoted to the shooting that took place at Sandy Hook Elementary School in Newtown, Connecticut. Watch the full report Tragedy at Sandy Hook Elementary with Brian WIlliams live from Newtown, Connecticut at 10pm/9c or streaming live online at NBCNews.com

NBC News' Lester Holt reports how the day of a shooting massacre in Newtown, Connecticut unfolded, from the moment Newtown police received an emergency 911 call from the Sandy Hook Elementary School to the children and parents who share their grievances over the 28 killed, including the shooter himself, 20-year-old Adam Lanza.